Motor-driven shears



1,642,259 Sept. 13, 1927- D. F. MORSE MOTOR DRIVEN SHEARS Filed June so.1926 I 3 Sheets-Sheet 1 1,642,259 p 1927- D. F. MORSE MOTOR DRIVENSHEARS Filed June 50, 1925 3 Sheets-Sheet 2 DeZZertFMorse INVENTOR M BYATTORNEY WITNESS: I

D. F. MORSE MOTOR DRIVEN SHEARS Filed June 30. 1926 5 Sheets-Sheet 3 A rg r k J/ M l a w w '',\\\\\\\\\\\\\\\\\w x O N I 3 7 o PeZZertFMOnS'cWITNESS:

Patented Sept. 13, 1927.

nmsn'r I. HORSE, OI LAKEPOBT, NEW HAMPSHIRE.

Moron-Darwin 51mm.

Application filed June 80,

The object of this invention is to provide a device of the typeindicated which shall include a stationar blade and a power operatedblade the ormer being adapted to serve as a guiding element andpermitting of the safe and accurate use of the article for cutting hair,and in connection with other operations, it being understood that themec anism is capable of use under various conditions.

. A further object'is to provide means enabling the o erator to have ascomplete control of the ears as if an instrument of the ordinary handtype were to be employed.

A further object is to rovide a single element operated by the t umb orby one of the fingers of the user, and enabling him to start themechanism and thereafter to vs the extent of the stroke of the movablebla e by continued pressure in the same direction, the complete releaseof pressure acting to throw out a clutch and stop the machineautomatically, avoiding the possibility of damage in the event that thearticle is dro ped or displaced from proper position in the hand of theuser.

A further object is to provide for vary.- ing the stroke in the oppositedirection by the partial release of the controlling device.

With the foregoing and other objects in view, the invention consists inthe novel construction and arrangement of elements described,illustrated and claimed, it being understood that modifications may bemade within the 500 e of the claims without departin from t 0 Spirit ofthe invention.

In the drawings forming part of this application,

Figure 1 is a view of the device in elevation, the position of the handbeing illustrated in dotted lines, although the instrument may beotherwise held.

Figure 2 shows the main operative ele ments in elevation.

Figure 3 is a detail view, in rspective, showing the control of theclutc mechanism.

Figure 4 is a detail in section on line 4-4 of Figure 7.

cover or side plate having been removed.

Fi re 6 shows a rtion of the structure of Figure 5, under ifi'erentadjustment.

Figure 7 is a view, with parts broken extent 0 Figure 5 is a viewchiefly in elevation, the

1 1928. Serial No. 118,690.

away, showing details of the drive and of the means for varying thestroke.

Figure 8 is a view of the operative eleznents, chiefly in plan, withportions in sec- Figure 9 is a detail view showi for controlling theposition of the of lever arm 64.

The housing includes a main portion 10 adapted to be closed by a coverlate, or cover sectlon, and provision is mad; atone end of the housingfor connection with the driving means. and at the other end for mountingthe blades. The stationary blade is designated 12, and is mounted bymeans of the pivot element or screw 13, which however constitutes apivot only for the movable blade 14. A retaining element 16 extends overthe shank portion of the stationary blade and is secured to the housingby means of screw 17, and extending thru the housing 10, oppositeelement 16 is an adjusting screw 18 adapted to determine the movement ofthe blade 14, so that this element will be correctly positioned withreference to the point of the other blade.

The shank element of the movable blade is designated 20 and an offsetelement 21 exmeans lcrum tending from portion 20 has pivotal connectionby means of screw 22 with arm 23, constituting an im ortant element inthe combination and orming a part of the mechanism b which the extent ofthe stroke of the mova le blade is determined. This element 23 includesa slotted rtion 24, and a in 25 extends thru the s ot, a roller 26carried by the pin directly engaging the walls or edges of the slot 24.

This in 25 is carried by wheel 27 rotating wit ear wheel 28 carrying aclutch face 29 a apted for cooperation with the movable clutch element30 controlled by a clutch yoke 31 pivoted at 32, as shown in Figures 3and 4. g

The drive for bevel gear wheel 28 is by means of beveled pinion 33 onshaft 34, the latter carrying gear wheel 35 m with pinion 36 on shaftelement 87 with w eh I. flexible driving shaft, from a motor is to beconnected. Shaft 37 is positioned within sleeve 38, and is surrounded bya sleeve 39, a resilient element 40 located in opposite channeledportions serving an obvious purpose.

The sleeve 39 has threaded connectionwith the housing, as shown at 31.

The movable element of theclutch is controlled by arm 43, and acontrolling device including a pin 44 co-operates with arm 43, and isprovided with a. cutaway portion 45, of the form shown, one endterminating in a shoulder at 46. The pin 44 passes thru a bearing inblock 47, and is controlled by a thumb member 48, it being understoodthat pressure may be applied if preferred, by one of the fingers of thehand. The thumb member includes a shank or tubular portion 49 passingthru an aperture in housing 10, and

" a coiled spring 50 norm-ally holds the thumb member in an outerposition, at which time the clutch element 30 is disengaged fromv clutchelement 29. Pin 44 carries the laterally extendin element or pin 44'adjacent to the wall of lock 47, and it may here be mentioned that theinitial pressure on the controlling pin causes the clutch elements toengage, and continued pressure thereon is employed for varying thestroke in the manner disclosed below.

Pivoted arm 23 is slidably connected with block or the like and thelatter is connected by pin or screw with slide 57 operating within achanneled element 58 having an end stop 59, the channel member beingcarried by plate 60 on which the principal driving elements within thehousing are mounted.

The slide 57 provides means whereby the position of the fulcrum of arm23, constitoting a lever, may be changed, so that the extent of strokeof the movable blade 14 may be varied as desired, it being recalled thatthis blade is operated thru the connection at 22 with ofi set member 21of shank 20 of said movable blade. lln Figure 5 and elsewhere thefulcrum for pivoted arm 23 is shown at the extreme left, or near thatpoint, and in Figure 6 the fulcrum has been shifted to the right, thismovement being controlled by thumb member 48, subsequent to the initialmovement thereof, and after the clutch elements have been engaged.

The slide or shoe 57 is controlled by an arm 64 having a slot 65 thereinenga ing pin 66 extending into the slide, and sai arm is pivoted at 67on a post or the like carried by plate 60. A spring 68 is connected witharm 64, this being a tension spring and having its other end connectedwith a. stationary element 69 on the housing 10. An angle arm 70pivotally mounted at Tl, is connected by a pivoted link 72 with arm 64,and at the point 64 thereon. The angle arm 70 is slotted at 73, and thisslotis engaged by pin 44 on the main in 44, by means of which thecontrol is etdected.

During the initial movement of controlling pin it by thumb member 428,the pin i l operates in slot 73, and no movement of slide eeaeas ducesthe movement of an 1e lever or arm 70 in a counter-clockwise irection,exerting pull on link 72, and shifting the slide 5'? toward the right,in Figure 9 and elsewhere, thereby changing the fulcrum point of leveror arm 23, for varying the extent of the stroke of the pivoted blade, asbefore indicated. In this manner pressure on the thumb member 48decreases the stroke of movable blade 14, and partial release of thumbmember 48 increases the length of the stroke. Complete release ofpressure throws out the clutch, and the tool ceases to operate.

The clutch engages under the action of spring 43' when pin 44 underpressure releases the arm cooperating with the slotted portion of saidpin 44.

Having described the invention what is claimedis z. 1

Y -l. Ina device of the class described, a

housing, a stationary blade carried thereby,

a movable blade cooperating with the stationary blade, mechanism fordriving, the movable blade, mechanism for varying the extent of strokeof the movable blade, and a controlling device operatively connectedwith both of said mechanisms.

2. In a device of the class described, a

housing, a stationary blade carried thereby, a movable-bladecooperatitng with the stationary blade, mechanism for driving themovable blade, mechanism for varying the extentof stroke of the movableblade, and a spring actuated and manually actuated controlling ,device.

3. in a device of the class described, a housing, a stationary bladecarried thereby, a movable blade cooperating with the stationary blade,mechanism for driving the movable blade, mechanism for varying theextent of stroke of the movable blade, and including a lever armoperatively connected with this blade, and means for changing theposition of the fulcrum of said arm, and a controlling deviceoperatively connected with both of said mechanisms.

1-. In a device of the class described, a housing, a stationary bladecarried thereby, a movable blade cooperatitng with the stationary blade,mechanism For driving the movable blade. mechanism for varying theextent of stroke of the movable blade, and a controlling device movableinitially for throwing the driving mechanism into operative conditionand movable thereafter for controlling the mechanism for varying theextent of stroke.

5. In a device of the class described, a housing, a stationary bladecarried thereby and constituting a guiding and stead ing element for theoperator, a movable 1) ads eanne cooperating with the stationary blade,driving mechanism for the movable blade and a evice operativelyconnected with the driving means for throwing it into action and varyingthe extent of stroke of the blade.

6. In a device of the class described, a housing, a stationary bladecarried thereby and constituting a guiding and steadying element for theoperator, a movable b ade cooperatitng with the stationary blade,driving mechanism for the movable blade, means for manually throwing thedriving mechanism into 0 ration for imparting motion to the movab eblade, devices connected with said" means for determining the positionof 15 .In testimony w ereof I afin my signature. I

DELBERT F. MORSE.

